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Coregistration of eye movements and EEG in natural reading analyses and review

  • Brain-electric correlates of reading have traditionally been studied with word-by-word presentation, a condition that eliminates important aspects of the normal reading process and precludes direct comparisons between neural activity and oculomotor behavior. In the present study, we investigated effects of word predictability on eye movements (EM) and fixation-related brain potentials (FRPs) during natural sentence reading. Electroencephalogram (EEG) and EM (via video-based eye tracking) were recorded simultaneously while subjects read heterogeneous German sentences, moving their eyes freely over the text. FRPs were time-locked to first-pass reading fixations and analyzed according to the cloze probability of the currently fixated word. We replicated robust effects of word predictability on EMs and the N400 component in FRPs. The data were then used to model the relation among fixation duration, gaze duration, and N400 amplitude, and to trace the time course of EEG effects relative to effects in EM behavior. In an extendedBrain-electric correlates of reading have traditionally been studied with word-by-word presentation, a condition that eliminates important aspects of the normal reading process and precludes direct comparisons between neural activity and oculomotor behavior. In the present study, we investigated effects of word predictability on eye movements (EM) and fixation-related brain potentials (FRPs) during natural sentence reading. Electroencephalogram (EEG) and EM (via video-based eye tracking) were recorded simultaneously while subjects read heterogeneous German sentences, moving their eyes freely over the text. FRPs were time-locked to first-pass reading fixations and analyzed according to the cloze probability of the currently fixated word. We replicated robust effects of word predictability on EMs and the N400 component in FRPs. The data were then used to model the relation among fixation duration, gaze duration, and N400 amplitude, and to trace the time course of EEG effects relative to effects in EM behavior. In an extended Methodological Discussion section, we review 4 technical and data-analytical problems that need to be addressed when FRPs are recorded in free-viewing situations (such as reading, visual search, or scene perception) and propose solutions. Results suggest that EEG recordings during normal vision are feasible and useful to consolidate findings from EEG and eye-tracking studies.show moreshow less

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Metadaten
Author:Olaf Dimigen, Werner Sommer, Annette Hohlfeld, Arthur M. Jacobs, Reinhold KlieglORCiDGND
DOI:https://doi.org/10.1037/a0023885
ISSN:0096-3445 (print)
Parent Title (English):Journal of experimental psychology : General
Publisher:American Psychological Association
Place of publication:Washington
Document Type:Review
Language:English
Year of first Publication:2011
Year of Completion:2011
Release Date:2017/03/26
Tag:EEG; artifact correction; eye tracking; fixation-related potentials; natural viewing
Volume:140
Issue:4
Pagenumber:21
First Page:552
Last Page:572
Organizational units:Humanwissenschaftliche Fakultät / Institut für Psychologie
Peer Review:Referiert